Hoisting mechanism



A ril 7, 1936. w. 'r. DALTON HOISTING MECHANISM Original Filed April 29, 1936 2 Sheets-Sheet l INVENTOR WI/I/a/n 7.' 17a #00 ATTORNEYS j Patented Apr. 7, 1936 UNITED STATES HOISTING PATENT OFFICE MECHANISM Original application April 29, 1935, Serial No.

Divided and this application August 10, 1935, Serial No. 35,583

2 Claims.

This invention relates to improvements in hoisting mechanism.

Its object is to provide a simple device for engaging and raising an object to be hoisted. More specifically, its object is to provide a pair of lifting rods suspending on chains and affixed to pulleys in such a manner that they clear the sides of the object to be lifted, and are first moved under the object as they are raised.

An arrangement embodying this invention is shown and described in my copending application Serial No. 18,717, filed April 29, 1935, of which this application is a division.

Referring to the drawings,

Fig. 1 is a plan view of a locomotive equipped with a mechanism which embodies my invention and of a fiat car which is adapted to be hoisted thereby;

Fig. 2 is a side elevation of the parts which are shown in Fig. 1; and

Fig. 3 is a sectional end elevation of the hoisting mechanism and of the fiat car shown in the preceding figures on a somewhat larger scale. The section in this figure is taken on the line 3-3 of Fig. 1.

l0 designates the body of an ordinary electric mine locomotive mounted on wheels H which in this case are flanged and arranged to run on rails l2. I4 is a large gear afiixed in a horizontal position to the top of the body l0. I5 is a turntable supported above gear l4 by anti-friction bearings l6.

Supported on the turn-table is a main frame comprising parallel side members 26 and a plurality of transverse members 2!, 22, 23, 24, 25, 26, and 21. Two of the frame members, 24 and 25, rest upon and are affixed to the turn-table l5. A counterweight 58 is on one end of this frame.

30 is an electric motor mounted upon a shelf 3| below the main frame. It is connected to drive ropes or cables 32 which run alternately under and over grooved sheaves 33, 34, 35, and 36 mounted upon shafts which run between the transverse members 22 and 23 of the main frame. Affixed to the shafts of the grooved sheaves are friction pulleys 43, 44, 45, and 46.

60 is a friction pulley between the pulleys 44 and 45. It may be moved into driving engagement with either of them by a manipulation of a lever 6! to cause its shaft 62 to be driven in one direction or the other. Shaft 62 is arranged to actuate the car raising and dumping mechanism which will be described later.

A secondary frame is pivotally mounted in the end of the main frame opposite the counterweight 58. It comprises parallel side members connected at their ends by transverse members 8| which are centrally supported on bearings 82 in the transverse members 26 and 21 of the main frame. This secondary frame is in a part of the main frame which extends beyond the body In of the locomotive.

83, 83 are parallel shafts in bearings 84, 84 in the transverse members 8|. On each of these shafts are two chain gears 85 and a bevel gear 86. The latter mesh with bevel gears 63 on the ends of a transverse shaft 64 in bearings on one of the transverse members 8|. In the center of shaft 64 is a gear 65 which is in mesh with a Worm 66 on the end of shaft 62.

It is evident that the operator may, by manipulation of the lever 6| and the mechanism previously described, cause the shaft 64 to be driven in either direction.

81, 81 are chains, one end of each of which is afiixed to one of the chain gears 85, and the other ends of which are connected to lifting rods 88. It may be seen that when the chain gears are in the positions in which they are shown in Fig. 3 the lifting bars 88 will hang directly under the shafts 83.

90 is a fiat car having wheels 9| adapted to run on the tracks l2. The body of the car overhangs the wheels and forms shoulders 92 which are to be engaged by the lifting rods 88. 93 are lugs at the outer edges of the shoulders.

I will now describe the operation of the apparatus. The locomotive or a loaded car is moved on the track until they are in the relative positions shown in Figs. 1, 2, and 3. Shafts 83 are then turned in opposite directions to cause the chain gears 85 to rotate in the directions indicated by the arrows in Fig. 3. The first effect of this rotation is to move the lifting bars 88 into the positions indicated at 88A (Fig. 3) under the shoulders 92 of the car and inside the lugs 93. Further rotation of gears 85 will cause the chains 81 to be wound up on them to lift the car. The gears 85 are flanged to receive the chains.

After the car has been raised, the main frame may be rotated to move the car laterally and the secondary frame may be rotated to dump the car, as fully described in my aforesaid copending application.

After the car has been dumped the main frame may be rotated back to its initial position and the car lowered to its initial position on the track, or it may be rotated from its original position and the car lowered onto the track on the other side of the locomotive.

The mechanisms shown and described are for illustrative purposes only, as changes and structural modifications may be made within the spirit and scope of the invention and I intend no limitations other than those which are imposed by the appended claims.

What I claim is:

1. A hoisting mechanism comprising a pair of pulleys in axial alinement with each other, a hoisting bar under said pulleys, flexible elements aifixed to said pulleys near the peripheries thereof and to the hoisting bar, another pair of pulleys in axial alinem'ent with each other, spaced from said first mentioned pulleys, a second hoisting bar under said other pair of pulleys, flexible elements affixed to said other pair of pulleys near the peripheries thereof and to said second hoisting 7 said pulleys, flexible elements aflixed to said pulleys near the peripheries thereof and to the hoisting members, and means for rotating said pulleys in opposite directions to raise the hoisting members simultaneouslyand to impart to said members initial lateral movements.

7 WILLIAM T. DALTON i Hmmm 

